Heat exchanger



Jamil, 1955 Filed Aug. 19, 1950 H. H. FELDSTEIN ,699 322 HEAT Excmmcza 4 Sheets-Sheet I,

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v wMr fwd Arrapzwgys Jan. 11, 1955 H. H. FELDSTEIN HEAT EXCHANGER 4 Sheets-Sheet 2 Filed Aug. 19, 1950 L N L I 5 IWVENTOR. flew/b M/ aasrsm Jan. 11, 1955 H. H'. FELDSTEIN HEAT EXCHANGER Filed Aug. 19, 1950 4 Sheets-Sheet" 3 JNVENTOR. flE/VIPY 6- Fa oars/w BY 2am BW A Tree/vs ya Jan. 11, 1955 H. H. FELDSTEIN 2,699,322

HEAT EXCHANGER Filed Aug. 19, 1950 4 Sheets-Sheet 4 INVENTOR. Hen/FY A! Faosrsuv BY law? Arr- Nays Another object of the invention is United States Patent OfiFice 2,699,322 Ratented Jan. 11, 1955 HEAT .EXCHANGER Henry H. Feldsteln, Cleveland, Ohio Application August 19,.1950, Serial bio-180,380 4 Claims. (Cl. 25728) The invention relates to ev-aporators and similar structures, particularly to apparatus adapted to receive a liquid substance therein for transmitting quantitiesof heat there to, or for withdrawing heat therefrom, which apparatus may have a vacuum set up therein.

The

ra-tus which is of maximum strength with use of a minimum amount of material.

to provide an evaporator wherein a plurality of concentric heating ring elements elements are supported .upon supports to. permit ready elements with increases or decreases in the diameters thereof due to thermal expansion or contraction.

Another object of the invention is to ring elements which have effective means therein for passage of heating fluid thereto and removalv of incondensahle gases and any liquid condensates from such heating means.

Yet another at minimum cost. The foregoing made more apparent as the specification proceeds.

are provided and wherein portions of such ring provide heating p For a better understanding of the invention, attention is directed to the accompanyingdrawings, wherein:

Fig. 1 is a vertical section through apparatus embodying the principles of the invention, which section is taken on line 1-1 of Fig. 7;

Fig. 2 is a plan view of one of the of the invention;

Figs. 3, 4 and 5 are vertical sections taken onlines 33, 44 and 5-5 of Fig. 2;

Fig. 6 is a partially broken away enlarged vertical section taken on line 6-6 of Fig. 2; and

Fig. 7 is a plan of the apparatus of Fig. 1.

Corresponding numerals will be used to refer to corresponding parts in the drawings and specification whereheating elements Reference now should be had to the details of the struc ture shown in the drawings and an evaporator is indicated 13 that is inverted frusto-conical shape.

As an important feature of the present invention, each of the ring elements 3 through 11 is provided with an whereas an inner wall 15 of each of the heating ring elements is corrugated with the corrugations extending annularly around the element to give same maximum strength against collapse. The inner and outer walls 14 and 15 are spaced from each other by means of top and bottom rings or members 16 and 17, respectively, each of which is inclined in :a direction towards the center of the heating element in a direction of from top to bottom thereof. Members 17 extend 19-15 provided for each of the heating elem I nts Figs 3' through 6 of the drawings best show the construction of an individual heat transfer ring element and all" elements 3 through 11 are of sirnilar cotistruction.

The air and gas'return' pipes 18 and con'densate'returh pipes 19 all extend only approximately around the circumference of the different elements. The condensate return pipes 19 form a bottom portion in" th'esection of the heating which it is positioned and cornbines with the bottom member 17 to complete that portion of the ring element. The air and gas return pipes 18 only replace a portion of the top member 16 in the different heating ring elements, all as bestshown in'Figs. 3 through 6 of the drawings. It also should be noted that the inner and outer walls wardly from the bottom 13.

Drain tubes individually and extend Fig. 6 of the drawing best shows that the inlet ends of both the air and gas return pipe 18 and condensate pipe 19 are connected by a pipe 40 which has apertures 29 and 30, respectively, provided in the upper and lower portions thereof for passage of excess steam, air or gas, and condensate into the pipes 18 and 19 respectively for passage from the evaporator of the In order to prevent the non-condensable gases from mixing with the steam entering a separate air and 34, within the elements, aid in holding the return tubes 31 in position. Rods 41 may be secured in the upper portions of the ring elements to complete the rings started by the air and steam return pipes 18. v

It will be appreciated that the ends or discharge portions of both the air and gas return pipes and condensate pipes 18 and 19 will be lower than the inlet ends thereof to facilitate flow of liquid or fluid through the discharge ends thereof.

it might be desirable to position only alternate elements bracket 26, or other supports may be provided for the ring elements to permit movement of same with relation to the fixed supply and exhaust pipes positioning one portion thereof.

By positioning the individual heating elements in the apparatus in the manner indicated, and by the construction disclosed, it is possible to provide a sturdy evaporator device which can be constructed at a minimum of expense and by the use of a minimum amount of material whereby it is submitted that the objects of the invention have been achieved.

While one complete embodiment of the invention has been disclosed herein, it will be appreciated that modification of this particular embodiment of the invention may be resorted to without departing from the scope of the invention as defined by the appended claims.

Having thus described my invention, what I claim is:

1. A heat exchanger comprising a container, a hollow sleeve-type heating element positioned in said container, means for supplying heating fluid to the said element, said heating fluid supply means comprising only one inlet pipe that connects to said element, said inlet pipe and the portions of the said element connected thereto being immovably positioned, and a fixedly positioned drain pipe connected to said element circumferentially adjacent the said inlet pipe; said heating element including an air and gas return tube at its upper margin, a condensate return tube at its lower margin, both of such tubes being of approximately 180 in peripheral extent with relation to the said heating element margins and being open only adjacent their ends, the discharge end of each condensate return tube extending to a point adjacent said drain pipe and the inlet end of each such tube connecting to the interior of said element, and a gas and air discharge pipe positioned in said drain pipe and connegted to the discharge end of said'air and gas return tu e.

2. A heat exchanger comprising a container, a plurality of concentric radially-spaced hollow-sleeve type separate heating elements positioned in said container, said elements each having a smooth cylindrical outer wall and a corrugated inner wall, fixedly positioned means for supplying heating fluid to the said elements, and drain means immediately circumferentially adjacent said heating fiuid supply means for withdrawing spent heating fluid from said elements; said heating fluid supply means and said drain means comprising steam pipes that connect to said elements, a fixedly positioned drain pipe connected to each of said elements adjacent the one of the said steam pipes connected thereto, and slide means for supporting other circumferential portions of each of said elements is provided to permit expansion and contraction of said elements.

3. A heat exchanger comprising a tank, a plurality of concentric hollow sleeve-like heating elements in said tank, fixedly positioned inlet means and fixedly positioned drain means for said heating elements secured to circumferentially adjacent portions of and supporting each of said heating elements, slide means adjustably supporting said heating elements at portions of said elements circumferentially spaced from said inlet means and said drain means, an air and gas return tube at the upper margin of each of said heating elements and operatively connecting at one end to the interior of said heating element substantially diametrically opposite to said inlet means, outlet meansconnecting to said air and gas return tube, and a condensate return tube at the bottom of each of said heating elements and 0peratively connecting at one end to the interior of said heating elements substantially diametrically opposite to said inlet means, the opposite ends of said condensate return tubes connecting to said drain means.

4. A heat exchanger as in claim 2 wherein each of said heating elements has an air and gas return tube at its upper margin and a condensate return tube at its lower margin, both of such tubes in each element being of approximately in peripheral extent with relation to the said heating element margins and being open only adjacent their ends, one end of each condensate return tube connecting to said drain pipe and one end of each said air and gas return tube, the other ends of said condensate return tubes communicating to the interior of said element, and outlet means connecting to the other end of said air and gas return tube.

References Cited in the file of this patent UNITED STATES PATENTS 

